Estimate the water volume of a rectangular hot tub.
The tub's boxed volume converts to gallons and liters, and dividing by hose flow gives a realistic fill time. Hot tub chemicals, heaters and fill costs are all dosed by water volume, so an accurate figure is the foundation.
Hot Tub Volume
Gallons = L x W x D x 7.48052; minutes = gallons / gpm
Gallons = L x W x D x 7.48052; minutes = gallons / gpm The tub's boxed volume converts to gallons and liters, and dividing by hose flow gives a realistic fill time.
Hot tub chemicals, heaters and fill costs are all dosed by water volume, so an accurate figure is the foundation.
This calculator takes 4 inputs: Length, Width, Depth, Hose flow. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.